Gas barrier polyamide film

Abstract

The objective of the present invention is to provide a gas barrier polyamide film excellent in water resistance adhesiveness (water resistant laminate strength), impact resistance and pinhole resistance. The gas barrier polyamide film is characterized in comprising a stretched polyamide film, wherein the stretched polyamide film comprises A Layer: a base layer and B Layer: an easily adhesive layer on at least one surface of the A Layer, C Layer: an inorganic thin film layer is laminated on the surface of the B Layer in the stretched polyamide film, the A Layer comprises 65 mass % or more of Polyamide 6, the B Layer comprises 60 to 100 mass % of a Polyamide 6 copolymer and 0 to 40 mass % of Polyamide 6, and a ratio of a copolymer component in the Polyamide 6 copolymer is 3 to 35 mass %.

The invention claimed is: 
     
       1. A gas barrier polyamide film, comprising a stretched polyamide film,
 wherein the stretched polyamide film comprises A Layer: a base layer and B Layer: an easily adhesive layer on at least one surface of the A Layer, 
 C Layer: an inorganic thin film layer is laminated on the surface of the B Layer in the stretched polyamide film, 
 the A Layer comprises 65 mass % or more of Polyamide 6, 
 the B Layer consists of 60 to 100 mass % of a Polyamide 6 copolymer and 0 to 40 mass % of Polyamide 6, 
 a ratio of a copolymer component in the Polyamide 6 copolymer is 3 to 35 mass %, 
 the Polyamide 6 copolymer is Polyamide 6/66 copolymer, Polyamide 6/12 copolymer, Polyamide 6/610 copolymer, or Polyamide 6/11 copolymer, and 
 the A Layer, the B Layer, and the C Layer are laminated in the order of A Layer/B Layer/C Layer or B Layer/A Layer/B Layer/C Layer. 
 
     
     
       2. The gas barrier polyamide film according to  claim 1 , wherein the A Layer comprises 70 mass % or more of Polyamide 6. 
     
     
       3. The gas barrier polyamide film according to  claim 1 , wherein the Polyamide 6 copolymer is a Polyamide 6/66 copolymer, and the A Layer comprises 0.5 to 30 mass % of the Polyamide 6/66 copolymer. 
     
     
       4. The gas barrier polyamide film according to  claim 1 , wherein the Polyamide 6 copolymer is a Polyamide 6/12 copolymer, and the A Layer comprises 0.5 to 30 mass % of the Polyamide 6/12 copolymer. 
     
     
       5. The gas barrier polyamide film according to  claim 1 , wherein a thickness of the laminated stretched polyamide film is 5 to 30 μm, a thickness of the A Layer is 4.5 μm or more, and a thickness of the B Layer is 0.5 μm or more. 
     
     
       6. The gas barrier polyamide film according to  claim 1 , wherein water resistant laminate strength is 1.0 N/15 mm or more.